ADU Contractor in Orange County – Detached, Custom & Permits
Building an Accessory Dwelling Unit (ADU) in Orange County can completely transform your property: extra space for family, steady rental income, or a smart way to boost property value.
At LS Contractor, we are specialized ADU contractors in Orange County, with over 200 projects completed in cities like Fullerton, Irvine, Anaheim, and Orange. Our approach is simple: custom design, streamlined permits, and on-time construction.
👉 Schedule Your Free ADU Consultation Today and discover how to turn your ADU vision into reality with the confidence of working with local experts.
Why Build a Detached ADU in Fullerton?
An ADU isn’t just an addition—it’s an investment. With high demand for housing across Southern California, building an ADU is one of the smartest choices a homeowner can make.
âś… Rental Income: An ADU in Orange County can generate between $1,800 and $3,000 per month depending on size and location.
âś… Increase Property Value: Homes with ADUs can see property value increase by up to 30%.
âś… Family Flexibility: Perfect as a granny flat for aging parents or as private space for adult children.
âś… Custom Options: From a detached backyard ADU to a tailored energy-efficient unit, the design adapts to your needs.
Snippet Answer:
A Detached ADU in Fullerton provides rental income, raises property value, and creates flexible living space for family or tenants.
Our Custom ADU Design & Build Process
The success of an ADU project depends not just on construction, but on the entire process. At L Square Construction, we follow a proven step-by-step approach to deliver results without surprises.
1. Free Consultation & Site Assessment
We visit your property, review available space, and discuss your goals—whether rental income, family use, or increasing property value.
2. Tailored ADU Design
Our team creates custom ADU designs—from modern energy-efficient backyard ADUs to classic granny flats. We include floor plans, finishes, and sustainable options.
3. Permit Process Simplified
Permits are often the biggest headache for homeowners. Our team knows the regulations of every city in Orange County, including Fullerton, Irvine, and Anaheim. We handle:
- Plans and technical requirements
- City submission
- Tracking until approval
4. Construction Phase
We manage construction with a defined schedule, using high-quality materials and following California’s energy-efficiency codes.
5. Final Walkthrough
Before delivery, we conduct a full walkthrough with you to ensure every detail is correct.
Snippet Answer:
LS Contractor handles the entire ADU process in Orange County—from consultation and design to permits, construction, and final delivery.
Permits and Regulations Made Simple
Permits often cause delays, but our local expertise speeds things up.
In cities like Fullerton, Irvine, and Orange, requirements vary, but we manage everything for you.
- Do you need a permit for an ADU in Fullerton? Yes, and we handle it from start to finish.
- Size limits: Typically from 400 to 1,200 sq ft depending on zoning.
- Key requirements: Independent entrance, utility hookups, seismic safety compliance.
Snippet Answer:
Yes, all ADUs in Orange County require permits. L Square Construction manages every step of the approval process.
Why Choose L Square Construction for Your ADU?
With so many contractors available, why do homeowners choose L Square Construction?
- Over 200 ADUs built in Orange County
- Specialized in detached ADUs and granny flats
- In-depth knowledge of local regulations
- Transparent pricing with no hidden costs
- On-time project delivery
Real Client Testimonial – Fullerton:
“We thought permits would delay everything, but L Square Construction made it simple. Today, our ADU is rented and brings in steady monthly income.” – M. Rodriguez
Snippet Answer:
LS Contractor is a trusted ADU contractor in Orange County with proven experience, transparent costs, and fast permit approvals.
How Long Does It Take to Build an ADU in Orange County?
On average, an ADU takes 6 to 9 months from design to final delivery.
- Permits: 2–4 months
- Construction: 4–6 months
Snippet Answer:
Building an ADU in Orange County usually takes 6–9 months, including permits and construction.
What Is the Average Cost of a Detached ADU?
The cost of a detached ADU in Orange County depends on size, finishes, and site conditions.
- Estimated range: $200,000 – $350,000
- Price per sq ft: $250 – $400
Main cost factors:
- Size (400–1,200 sq ft)
- Premium vs. standard finishes
- Site grading or foundation requirements
Snippet Answer:
A detached ADU in Fullerton costs between $200,000 and $350,000, or $250–$400 per sq ft.
Frequently Asked Questions (FAQ)
How much does a detached ADU cost in Orange County?
Most detached ADUs cost between $200,000 and $350,000, depending on size and finishes.
How long does the ADU approval process take?
Typically 2–4 months, depending on the city and municipal workload.
Do I need a permit for an ADU in Fullerton?
Yes, all ADUs in Fullerton require a permit. LS Contractor manages the complete process.
What is the difference between a granny flat and a detached ADU?
A “granny flat” usually refers to a detached ADU designed for family use, while “detached ADU” can also serve as a rental or guesthouse.
Call to Action
Building an ADU in Orange County doesn’t have to be complicated. With LS Contractor, you get a local partner who handles design, permits, and construction—all under one roof.
👉 Schedule Your Free ADU Consultation Today and start transforming your property with a team trusted across Orange County.
